A new method of solving the power-flow problem, the holomorphically embedded load-flow method (HELM) is theoretically guaranteed to find the high-voltage solution, if one exists, up to the saddle-node bifurcation point (SNBP), provided sufficient precision is used and the conditions of Stahls theorem are satisfied. Two-bus reduced-order equivalents obtained using HELM-based models, involving si...

Most transportation-related applications are developed for privately-owned cars. Some recent ones are devoted to public transportation, they show limitations in dealing with the following aspects: (i) people who use public transportation may change transportation means not only within the same type but also among different modes such as between buses and subways and (ii) the system should take ...

One-line diagrams are widely used to represent the electrical power system current state and its probable performance in the case of studies and simulations. Hence, its adequate construction is of great importance to avoid inaccurate decisions of the network operators. In order to reduce the human errors and the huge effort in a manual generation technique (usually adopted nowadays), this work ...

This paper presents a mesh with virtual buses as the bandwidth-efficient implementation of the mesh with multiple broadcasting on which many computational problems can be solved with reduced time complexity. The new system provides a low latency and high bandwidth communication mechanism without the disadvantage of the dual network approach: the possible bandwidth waste. The virtual buses are b...

Bus systems are naturally unstable. Without control, the slightest disturbance to bus motion can cause buses to bunch, reducing schedule reliability. Holding strategies can eliminate this instability. However, the conventional schedule-based holding method requires too much slack time, which slows buses. This delays on-board passengers and increases operating costs. This paper studies a family ...

The architecture of 'mesh of buses' is an important model in parallel computing. Its main advantage is that the additional broadcast capability can be used to overcome the main disadvantage of the mesh, namely its relatively large diameter. We show that the addition of buses indeed accelerates routing times. Furthermore, unlike in thèstore and forward' model, the routing time becomes proportion...

Mesh connected computers have become attractive models of computing because of their varied special features. In this paper we consider two variations of the mesh model: 1) a mesh with fixed buses, and 2) a mesh with reconfigurable buses. Both these models have been the subject matter of extensive previous research. We solve numerous important problems related to packet routing, sorting, and se...

Buses are one of the safest modes of transport available and one of the options that governments in Europe are especially trying to promote, in order to meet congestion and emission targets. When a bus accident occurs it often becomes the focus of media and public attention, especially because the people involved had confidence in the transport and sometimes it is their sole transport reliance....

Walking buses are a way to increase physical activity by encouraging people to walk rather than rely on motorized forms of transportation. Several communities support walking school buses as an alternative mode of pupil transportation to schools. A possible extension of this concept is the introduction of adult walking buses. Given the novelty of the concept, very little is currently known abou...

Introduction and Scope Automotive cyber-physical systems (CPS) encompass nearly every research challenge offered by high-confidence computing. To scope this position paper, I will focus on open research questions in the design and assurance of fault-tolerant real-time automotive communication buses. An example of a fault-tolerant automotive bus in development today is FlexRay, and there are a v...